Matrix-setting and type-linecasting machine



Oct. 9, 1934. J. DORNETH MATRIX SETTING AND TYPE LINE CASTING MACHINE Filed May '22, 1955 Patented Oct. 9, 1934 aist PATENT MATRIX-SETTING AND TYPE-LINE- CASTING MACHINE Julius Dorneth, Konradshohe, near Tegel, Germany, assign or to Typograph G. m. b. BL,

Berlin, Germany Application May 22, 1933, Serial No.

In Germany September 24, 1932 '3 Claims.

The invention relates to a key mechanism for matrix-setting and type-line-casting machines, and more particularly a mechanism in which, after striking the keys, the subsequent matrix releasing operation is effected by power drive. Normally, in such key mechanisms, the matrix releasing devices are connected to the free ends of double levers, the other ends of. which rest on supporting elements moved by the keys. On depressing a key, that end of the lever which faces it moves downwardly, whereby the subsequent mechanical release is rendered possible. Discs mounted eccentrically on the releasing levers and adapted to rotate easily are usually employed for this purpose, and these discs are released on the aforesaid movement of the releasing levers and by th ir toothed periphery engage continuously rotating rubber rollers driven by the machine, so that due to their eccentric mounting, the said discs turn the arms of the releasing levers, carrying them upwardly beyond their inoperative position, whereby the associated matrices are released. As the compositor, when setting type, only strikes one key after the other, the matrices are only released one after the other in this sequence. If, however, a number of keys are depressed unintentionally on the inoperative machine, for example by unauthorized persons, and the corresponding eccentric discs are consequently brought into engagement with the rubber rollers, then, on starting up the machine, the associated matrices, which are not necessary for the composition, will first be released simultaneously.

5 For the purpose of preventing stoppages and damage to the matrices caused thereby, it is known to secure the releasing levers or the eccentric discs in their inoperative position by inserting a special locking bar in the key mechanism after stopping the machine. The said locking bars which are separate from the machine are about the length of the entire key mechanism. In the case of brief working pauses, therefore, the known device is hardly ever used in practice.

It has also been attempted to incorporate rotatable locking bars in the key mechanisms, but such locking bars all suifer from the disadvantage that they look not only the releasing levers but also the keys themselves, whereby damage may easily be caused to parts of the key mechanism if, in an unforseen manner, more than the normal pressure is exerted upon the locked keys. In addition, unauthorized persons interfering with the key mechanism will thus readily notice the oseies;

locking means and be induced to render them inoperative. Y r

The present invention consists in the fact that the rotatable locking bars incorporated in the key mechanism secure the releasing levers with the eccentrics in the inoperative position without the keys themselves being locked. The aforesaid disadvantages are thereby eliminated, and over and above this it is possible to allow an apprentice compositor to carry out under normal working conditions on the machine itself the setting or key exercises which are indispensable for him, without for instance the necessity for the separate key mechanisms frequently employed heretofore for such purposes.

A constructional example of the invention is shown diagrammatically inv the accompanying drawing, wherein:

Figure 1 is a side elevation of the key mechanism in part section, and

Figure 2 shows a IIII in Figure 1.

partial section along the line The releasing levers 3 are rotatably mounted on a spindle 2 in the casing l of the key mechanism. The free ends of the levers 3 are connected by means of members l (wires, rods,

Bowden (registered trademark) the matrix releasing devices not shown.

cables) to Those ends of the releasing levers 3 which face the keys 5 rest on supporting elements 6 moved by the keys 5. The discs 8 provided with teeth on their periphery and adapted to turn about a pivot '7 on the lever 3, in known manner so are mounted eccentrically that, on release of those ends of the releasing levers 3 which face the keys 5 being eiTected by the depression of the said keys, the discs 8 are brought into engagement with the continuously rotating rubber rollers 9 driven by the machine. their inoperative position tion by pins 10 which are The eccentric discs 8 are held in preparatory to operamounted on them and which bear against the stops 11, for example the prongs of a spacing comb, of the key mechanism.

A round or flat locking bar 12 (indicated by dotted lines in Figure 1) is rotatably mounted fixed in the casing 1 in the key mechanism casing 1 by means of pivots 13 eccentrically provided on the said bar in such a manner that the said bar, in its position denoted by A, bears against the releasing levers 3 and even raises them to a very slight extent,

while the locking bar 12 by B their free movement. If a flat locking bar in its position denoted is at a considerable distance from the releasing lovers 3 in order to render possible is em ployed instead of a round locking bar 12, the side engaging the levers 3 is preferably considerably curved to avoid wear on the parts. On one side of the key mechanism casing 1, a knob or handle 14 is, fixed on an extension of the pivot 13, which handle is operated by the compositor if the looking bar 12 is to be brought into the one or the other position. The end positions of the handle 14, corresponding to the positions A, B of the locking bar 12 are secured in any desired manner by stops or resilient'catches 15, 16. Instead of the arrangement of the. locking bar 12 as shown in Figure 1, in which the said locking bar co-operates with those arms of the releasing levers 3 which face away from the keys 5, it is also possible to mount the locking bar 12 within the key mechanism, for

instance at the points shown at Cand D in Figure 1, so as to lock those arms of the releasing levers 3 which carry the eccentric discs 8. When the locking bar 12 isv in its locking position, the keys 5 can be depressed unhindered without the releasing levers 3 and the eccentric discs 8 moving.

What I claim is:--

1. In a key mechanism for matrix-setting and type-line-casting machines, matrix releasing levers, operating keys therefor, and a rotatably operative common locking bar for preventing the release of the matrices, said lockingbar acting solely to hold the releasing levers in the inoperative position and leaving the keys free for use in practising.

2. A key mechanism as claimed in claim 1, wherein eccentric pivots are provided for rotatably mounting the bar and said bar being rounded at thepoint which comes into engagement with the releasing levers.

3'. A. key mechanism as claimed in claim 1, wherein eccentric pivots are provided for rotatably mounting the bar and said bar being rounded at the point which comes into engagement with the releasing levers, a handle for facilitating the operation of the locking bar, and catches for cooperating withv the handle in either of its adjusted positions. 1

JULIUS DORNETI-I. 

